Lord Zedd's first monster, Pirahntishead, now has control of the Tyrannosaurus Dinozord and the Dragonzord, commanding them to destroy the city. The Rangers watch helplessly, but all is not yet lost. Zordon & Alpha unveil a new set of five Zords, enhanced by the power of Thunder. Before they can fully bring these new Thunderzords to life, they must regain their old ones!